Arbotext Publishing Engine Programmer's Guide (《Arbortext Publishing Engine 程序员指南》) > The Arbortext Publishing Engine Request Manager > Understanding the Internal Structure of Arbortext PE Request Manager > Arbortext PE 子进程 Pool Attributes > The subprocessEnvironment Attribute
  
The subprocessEnvironment Attribute
You can specify subprocessEnvironment to have Arbortext Publishing Engine set the environment variables of the Arbortext PE 子进程. To ensure that Arbortext PE 子进程 have the expected values for environment variables, set them using the subprocessEnvironment parameter for each Arbortext PE 子进程 pool in the e3config.xml.
If you are using the Tomcat servlet container, be aware that newer versions clear some environment variables, such as CLASSPATH, and then set them to values needed by Tomcat prior to starting the Tomcat servlet container.
Any other variables in the Arbortext Publishing Engine environment are passed to its Arbortext PE 子进程 unchanged.